'use strict';

const common = require('../common');
const assert = require('assert');
const initHooks = require('./init-hooks');
const { checkInvocations } = require('./hook-checks');
const dgram = require('dgram');

const hooks = initHooks();

hooks.enable();
let send;

const sock = dgram
  .createSocket('udp4')
  .on('listening', common.mustCall(onlistening))
  .bind();

function onlistening() {
  sock.send(
    new Buffer(2), 0, 2, sock.address().port,
    undefined, common.mustCall(onsent));

  // init not called synchronously because dns lookup alwasy wraps
  // callback in a next tick even if no lookup is needed
  // TODO (trevnorris) submit patch to fix creation of tick objects and instead
  // create the send wrap synchronously.
  assert.strictEqual(
    hooks.activitiesOfTypes('UDPSENDWRAP').length, 0,
    'no udpsendwrap after sock connected and sock.send called');
}

function onsent() {
  const as = hooks.activitiesOfTypes('UDPSENDWRAP');
  send = as[0];

  assert.strictEqual(as.length, 1,
                     'one UDPSENDWRAP created synchronously when message sent');
  assert.strictEqual(send.type, 'UDPSENDWRAP', 'send wrap');
  assert.strictEqual(typeof send.uid, 'number', 'uid is a number');
  assert.strictEqual(typeof send.triggerId, 'number', 'triggerId is a number');
  checkInvocations(send, { init: 1, before: 1 }, 'when message sent');

  sock.close(common.mustCall(onsockClosed));
}

function onsockClosed() {
  checkInvocations(send, { init: 1, before: 1, after: 1 }, 'when sock closed');
}

process.on('exit', onexit);

function onexit() {
  hooks.disable();
  hooks.sanityCheck('UDPSENDWRAP');
  checkInvocations(send, { init: 1, before: 1, after: 1, destroy: 1 },
                   'when process exits');
}